l = [6, 5, 4, 4, 5, 6]
print(l)
s01 = {6, 5, 4, 4, 5, 6}
print(s01)
s02 = set(l)
print(s02)

s01.add(7)
print(s01)
s01.remove(5)
print(s01)
s01.clear()
print(s01)

